Question

Which of the statements below is NOT TRUE about meiosis and/or mitosis.

One reason meiosis I is different from mitosis because homologous pairs of chromosomes line up next to each other and then separate.
Daughter cells are produced in meiosis with half the number of chromosomes as the parent cell.
No exchange of genetic material is exchanged during meiosis, so there is no genetic diversity as a result of this process.

@oOKawaiiOo

Answer 1

Do you know how many cells there are at the start of mitosis and meiosis, and how many mitosis results in and how many meiosis results in?

Answer 2

@mrdoldum No i do not.

Answer 3

Mitosis starts with 1 and ends with 2. Meiosis starts with 2 and ends with 4. The DNA in a cell is duplicated before mitosis or meiosis starts. However, DNA is only duplicated once in both cases.

So, we know that meiosis results in 4 cells while mitosis results in 2. In mitosis, since DNA has been duplicated in an earlier phase (S phase), each of the 2 cells mitosis produces have the same amount of DNA as each other AND as the original cell.

If we know that mitosis has 2 cells with the same amount of DNA as the parent cell, and that meiosis only duplicates DNA once and ends with 4 cells, the resulting cells must have HALF the DNA of the parent cell.

Human sperm and egg cells are form meiosis and why we have a total of 46 chromosomes with half from the father and half form the mother.